def sign_up(request):
    if request.method != 'POST':
        form = SignUpForm()
    else:
        form = SignUpForm(data=request.POST)

        if form.is_valid():
            new_user = form.save(commit=False)
            new_user.email = form.cleaned_data['email']
            new_user.first_name = form.cleaned_data['first_name']
            new_user.last_name = form.cleaned_data['last_name']
            new_user.save()
            authenticated_user = authenticate(username=new_user.username,
                                              password=request.POST['password1'])
            login(request, authenticated_user)
            return HttpResponseRedirect(reverse('works:index'))

    context = {'form': form}
    return render(request, 'users/register.html', context)